He was one of the pioneers of GNU Guile. It was a lonely and thorny road. Guile was an underappreciated project with a small community, limited tooling for exploration, and very few reference projects to learn from. Only true lovers of the craft were willing to contribute under such conditions.
TTN had spent his precious life time to help to make the foundation of GNU Guile community. His works and skills in the code inspired me a lot in the early time.
I’ve heard that he also contributed to other free software projects, though what I’ve written here is what I know firsthand.
It says, the internet has its own memory. I hope that by writing this to remember what he did and the quiet impact he had.